神戸大学 大学院自然科学研究科
Observatoire de la Cote d'Azur
神戸大学 大学院自然科学研究科
著者所属（英）
Kobe University Graduate School of Science and Technology
Observatoire de la Cote d'Azur
Kobe University Graduate School of Science and Technology
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
雑誌名
第39回月・惑星シンポジウム
雑誌名(英)
Proceedings of the 39th ISAS Lunar and Planetary Symposium
ページ
182 - 185
発行年
2006-08-07
抄録（英）
The outcomes of previous high-velocity impact experiments using Yakuno basalt targets have been used to validate numerical codes of fragmentation developed in the context of planetary science. However, the distribution of incipient flaws in the targets, usually characterized by the Weibull parameters, has generally be implemented in the codes with values allowing to match the experimental outcomes. Here we follow the original method proposed by Weibull (1939) to measure these parameters for this Yakuno basalt. We obtain a value of the Weibull modulus m larger than the one obtained from simulation fits to the experimental data. The second Weibull parameter, called k, related to some characteristic strength of the material is also larger than those typically used in the simulations. However, the combination of the two parameters represented by ln(kV/m), where V is the volume of the target, has a value which is similar to the one allowing simulations to match the experiments. Future numerical simulations shall then use this new set of parameters to check that they still reproduce the experimental outcomes.
Weibull parameters of basalt targets used in high-velocity impact disruption experiments
